Sex with my Teacher

[Characters]
Boy:
A boy whose job is to protect the correct flow of human history with the help of various gods and heroes.
If he's prepared to do something, he'll do it. His allies call him "Master", He likes ponytails.

Teacher:
A sexy older girl allied with the main character. She's always wearing a skintight outfit.
She likes her guys a little younger, so she's been waiting for her shot at the hero.

[Story]
One day, a boy and his partner/teacher get stuck in a room they can't seem to leave...

After the pair thinks on how to escape for a while, a strange heart mark appears on the teacher's abdomen.
Very matter-of-factly she states that she knows the condition for leaving -- ejaculation.

She then pushes the boy down, sucking on his dick to the point of orgasm before releasing him again and again.
If he wants to cum, he's got to do it inside her, apparently, and she wants to make sure this works.
Tying her hair back into a ponytail, she keeps on squeezing him for everything he's got.

The next thing the boy knows, his teacher is wearing a familiar, backless sweater and resting his head on her lap.
She gives him a handjob while letting him suck her nipples, and then swallows all the resulting cum.
Now he pushes her down, and fucks her hard until he cums.

After that, the pair keeps going and going, using all the outfits the room is furnished with to make sure the boy keeps cumming.
Eventually, they do escape... but you'll have to read to find out exactly how!